GPT-5.1 Codex vs MiniMax M2.5
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
MiniMax M2.5 by MiniMax wins on 7 of 10 benchmarks against GPT-5.1 Codex by OpenAI, which leads on 3. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
General Intelligence: In general intelligence, MiniMax M2.5 scores 1443 on Chatbot Arena ELO compared to GPT-5.1 Codex's 1395.
Coding: In coding, MiniMax M2.5 scores 1200 on Design Arena ELO compared to GPT-5.1 Codex's 1197, while MiniMax M2.5 scores 1234 on Website Arena ELO compared to GPT-5.1 Codex's 1174.
Reasoning: In reasoning, MiniMax M2.5 scores 84.1% on GPQA Diamond compared to GPT-5.1 Codex's 65.0%.
Context: In context, GPT-5.1 Codex scores 400K on Context Length compared to MiniMax M2.5's 205K.
Pricing Comparison
GPT-5.1 Codex costs $1.3/1M input tokens and $10.0/1M output tokens, while MiniMax M2.5 costs $0.27/1M input and $1.1/1M output. MiniMax M2.5 is the more affordable option for API usage.
Speed Comparison
GPT-5.1 Codex generates output at 85 tok/s compared to MiniMax M2.5's 59 tok/s, and the time to first token is 400 ms for GPT-5.1 Codex versus 2330 ms for MiniMax M2.5. GPT-5.1 Codex delivers faster throughput.
Verdict
For developers prioritizing speed, GPT-5.1 Codex has the edge. For those who value general intelligence and affordability, MiniMax M2.5 is the stronger choice.
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GPT-5.1 Codex vs MiniMax M2.5 — FAQ
Which is better, GPT-5.1 Codex or MiniMax M2.5?
MiniMax M2.5 wins on more benchmarks overall (7 vs 3). However, the best choice depends on your specific needs — each model excels in different areas.
How does GPT-5.1 Codex compare to MiniMax M2.5 for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is GPT-5.1 Codex cheaper than MiniMax M2.5?
Yes, MiniMax M2.5 is cheaper. GPT-5.1 Codex costs $1.3/1M input and $10.0/1M output tokens. MiniMax M2.5 costs $0.27/1M input and $1.1/1M output tokens.
Which is faster, GPT-5.1 Codex or MiniMax M2.5?
GPT-5.1 Codex is faster, generating output at 85 tok/s compared to 59 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the GPT-5.1 Codex vs MiniMax M2.5 comparison cover?
This comparison covers 10 benchmarks including Chatbot Arena ELO, GPQA Diamond, Output Speed, Time to First Token, Input Cost, Output Cost, Context Length, Cached Input Cost, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.